JP2023525199A - First terminal, second terminal, and method - Google Patents

Abstract

Embodiments of the present disclosure relate to methods, apparatus and computer-readable media for communication. The method includes determining, at the first terminal, whether to obtain information regarding resource candidates for sidelink transmission. The method further includes receiving the information from the second terminal in response to determining to obtain the information. The method further includes determining target resources for performing the sidelink transmission based on the information. [Selection drawing] Fig. 4

Description

TECHNICAL FIELD Embodiments of the present disclosure relate generally to the field of telecommunications, and more particularly to methods, apparatus and computer-readable media for communication.

Some communication systems are capable of performing V2X (Vehicle to Everything) and D2D (Device to Device) communications. V2X communication can be based on communication technologies such as sidelink communication technology. As such, it is possible to establish sidelink resource pools and sidelink channels for vehicles participating in such communications.

In V2X communication, there are two modes of resource allocation. In a first mode (hereinafter also referred to as NR V2X mode 1 or mode 1), one terminal device may perform V2X communication with the other terminal device using resources allocated from the network device. In the second mode (hereinafter also referred to as NR V2X mode 2 or mode 2), one terminal device uses resources autonomously selected by itself in the resource pool to perform V2X communication with the other terminal device. may The feasibility and benefits of mode 2 enhancements need to be considered for increased reliability and reduced latency.

In general, exemplary embodiments of the present disclosure provide methods, apparatus and computer-readable media for communications.

In a first aspect, a method is provided for communication. The method includes determining, at the first terminal, whether to obtain information about resource candidates for sidelink transmission. The method further includes receiving the information from the second terminal in response to determining to obtain the information. The method further includes determining target resources for performing the sidelink transmission based on the information.

In a second aspect, a method is provided for communication. The method includes, at a second terminal, determining resource candidates for a first terminal to perform sidelink transmission. The method further includes determining whether to provide information about the resource candidates. The method further includes transmitting the information to the first terminal in response to determining to provide the information.

In a third aspect, a first terminal device is provided. The first terminal device comprises a processor and a memory in which instructions are stored. The memory and the instructions, together with the processor, are configured to cause the first terminal device to perform the method according to the first aspect.

In a fourth aspect, a second terminal device is provided. The second terminal device comprises a processor and a memory in which instructions are stored. The memory and the instructions, together with the processor, are configured to cause the second terminal device to perform the method according to the second aspect.

In a fifth aspect, a computer-readable medium having instructions stored thereon is provided. The instructions, when executed on at least one processor of the device, cause the device to perform the method according to the first aspect.

In a sixth aspect, a computer-readable medium having instructions stored thereon is provided. The instructions, when executed on at least one processor of the device, cause the device to perform the method according to the second aspect.

It should be understood that the Summary of the Invention section is not intended to identify key or essential features of embodiments of the disclosure, but is intended to be used to limit the scope of the disclosure. not. Other features of the present disclosure should be readily understood through the following description.

The above and other objects, features and advantages of the present disclosure should become more apparent through a more detailed description of several embodiments of the present disclosure in the accompanying drawings.

1 illustrates an exemplary communication network in which implementations of the present disclosure may be implemented;

4 illustrates an example signaling chart illustrating an example process of resource allocation in accordance with some embodiments of the present disclosure;

4 illustrates an example signaling chart illustrating an example process of resource allocation in accordance with another embodiment of the present disclosure;

4 illustrates a flow chart of an exemplary method according to some embodiments of the present disclosure;

4 illustrates a flow chart of an exemplary method according to some embodiments of the present disclosure;

1 is a schematic block diagram of an apparatus suitable for implementing embodiments of the present disclosure; FIG.

Throughout the drawings, same or similar reference numbers represent same or similar elements.

The principles of the disclosure will be explained with reference to several illustrative embodiments. It is understood that these embodiments are set forth for illustrative purposes only, to aid those skilled in the art in understanding and practicing the present disclosure, and do not imply any limitation on the scope of the present disclosure. want to be The disclosure as described herein can be implemented in various ways other than those described below.

In the following description and claims, unless defined otherwise, all technical and scientific terms used have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

As used herein, the term "terminal device" refers to any device with wireless or wired communication capabilities. Examples of terminal devices include user equipment (UE), personal computers, desktops, mobile phones, mobile phones, smart phones, personal digital assistants (PDAs), portable computers, tablets, wearable devices, internet of things (IoT) devices, IoE (internet of everything) devices, machine type communication (MTC) devices, vehicle-mounted devices for V2X communication (where X means pedestrian, vehicle or infrastructure/network), imaging devices such as digital cameras, game devices, Examples include, but are not limited to, music storage/playback devices, Internet devices that enable wireless/wired Internet access and browsing, and the like.

As used herein, the term "network equipment" or "base station" (BS) refers to equipment capable of providing or hosting a cell or coverage with which terminals can communicate. Examples of network equipment include Node B (NodeB or NB), Evolved NodeB (eNodeB or eNB), Next Generation NodeB (gNB), Transceiver Point (TRP), Remote Radio Unit (RRU), Radio Head (RH), Remote Low power nodes such as radio heads (RRHs), femto nodes, pico nodes, etc., but not limited to these.

As used herein, the singular forms “a,” “an,” and “the” include plural forms unless the context clearly indicates otherwise. intended to include. The term "including" and variations thereof is to be interpreted as an open-ended term meaning "including but not limited to". The term "based on" shall be interpreted as "based at least in part on". The terms "some embodiments" and "one embodiment" are to be interpreted as "at least some embodiments." The term "another embodiment" is interpreted as "at least one other embodiment". The terms "first," "second," etc. may refer to different objects or to the same object. The following content may contain other definitions, both explicit and implicit.

In some instances, a value, process or device is referred to as "optimal," "lowest," "highest," "minimum," "maximum," and the like. It should be understood that such description is intended to indicate that there is a choice among multiple functional alternatives that may be used, and that such choice may be superior or superior to other choices. , need not be smaller, higher, or better.

As described above, in V2X communication, in mode 2 of resource allocation, one terminal device may perform V2X communication with the other terminal device using resources autonomously selected by itself in the resource pool. . The feasibility and benefits of mode 2 enhancements need to be considered for increased reliability and reduced latency.

Embodiments of the present disclosure provide a solution for resource allocation in V2X communications to solve the above problems and one or more other potential problems. According to this solution, the first terminal device decides whether to obtain information about resource candidates for sidelink transmission. If it is determined to acquire information, the first terminal device receives information from the second terminal device. The first terminal then makes an informed determination of a target resource for performing the sidelink transmission. Coordination of resource allocation between the two terminals is thus possible.

FIG. 1 depicts a schematic diagram of an exemplary communication network 100 in which embodiments of the present disclosure may be implemented. As shown in FIG. 1, the communication network 100 includes a terminal device 110 (also referred to as “first terminal device 110”) and terminal devices 120-1 and 120-2 (collectively referred to as “second terminal device 120” or or individually referred to as "second terminal device 120"). It should be appreciated that communication network 100 may further include network equipment (not shown). The network device may communicate with the first terminal device 110 and the second terminal device 120 via respective wireless communication channels. It should be understood that the number of devices in FIG. 1 is shown for illustrative purposes and does not imply any limitation to the present disclosure. Communication network 100 may include any suitable number of network devices and/or terminal devices suitable for implementing implementations of the present disclosure.

In FIG. 1, the first terminal device 110 and the second terminal device 120 are shown as vehicles capable of V2X communication. It should be understood that the embodiments of the present disclosure are also applicable to terminal devices other than vehicles, such as mobile phones and sensors.

In some embodiments, first terminal device 110 may have established a sidelink with terminal device 120-1. In other words, first terminal 110 may have established an ongoing communication session with terminal 120-1. In this regard, terminal 120-1 may be referred to as the in-session terminal.

In some other embodiments, first terminal device 110 may not have established a sidelink with terminal device 120-2. In other words, first terminal 110 may not have established an ongoing communication session with terminal 120-1. In this regard, terminal 120-1 may be referred to as an out-of-session terminal.

In some other embodiments, the first terminal device 110 may communicate with the second terminal device 120-1 in a unicast manner. In yet another embodiment, the first terminal device 110 may communicate with a group of terminal devices in a groupcast manner. Note that the terminal device group may or may not include the terminal device 120-1 and the terminal device 120-2.

Communications in communication network 100 may conform to any suitable standard, including Global System for Mobile Communications (GSM), Long Term Evolution (LTE), LTE Evolution. (LTE-Evolution), LTE-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA), GSM EDGE Radio Access Including, but not limited to, networks (GERAN: GSM EDGE Radio Access Network), Machine Type Communications (MTC), and the like. Further, communication may be performed according to any generation of communication protocols now known or developed in the future. Examples of communication protocols include first generation (1G), second generation (2G), 2.5G, 2.75G, third generation (3G), fourth generation (4G), 4.5G, fifth generation ( 5G) communication protocols, but are not limited to these.

FIG. 2 depicts an exemplary signaling chart illustrating an exemplary process 200 of resource allocation according to some embodiments of the present disclosure. As shown in FIG. 2, process 200 may involve first terminal 110 and second terminal 120 shown in FIG. It should be understood that process 200 may include additional acts not shown and/or may omit some acts shown, and the scope of the disclosure is not limited in this respect. Further, although presented herein primarily as being performed sequentially, at least some of the operations of process 200 may be performed concurrently or in a different order than shown in FIG. It should be understood that the

As shown in FIG. 2, first terminal 110 determines 210 whether to obtain information about resource candidates for sidelink transmission.

In some embodiments, the first terminal device 110 decides to obtain information about resource candidates if it is determined that a predefined condition is met.

As noted above, in some embodiments, first terminal device 110 may communicate with terminal device 120-1 in a unicast manner. In other words, the first terminal device 110 may transmit at least one packet only to the terminal device 120-1. In such embodiments, the first terminal device 110 may determine a first number of consecutive failed packets or transport blocks. If the first number of consecutive failed packets or transport blocks exceeds a first set threshold, the first terminal device 110 may determine that the predefined condition is met.

In some embodiments, the first terminal 110 receives the first number of negative acknowledgments (NACKs) and discontinuous transmissions (DTXs) from the second terminal 120 as the first number of consecutive failed packets or transport blocks. You may decide as one number.

In embodiments where first terminal 110 communicates with terminal 120-1 in a unicast manner, first terminal 110 communicates with terminal 120-1 for a single hybrid automatic repeat request (HARQ) process identifier (ID). A second number of consecutively received NACKs by 110 may be determined. If the second number of NACKs exceeds a second set threshold, the first terminal device 110 may determine that the predefined condition is met.

In an embodiment where first terminal device 110 communicates with terminal device 120-1 in a unicast manner, first terminal device 110 receives a failed packet or failed transport block within a first time window. A third number may be determined. If the ratio of the third number to the fourth number of packets or transport blocks transmitted from the first terminal device 110 to the second terminal device 120 exceeds a third set threshold, the first terminal device 110 sends the predefined It may be determined that the condition is satisfied.

In some embodiments, the first terminal device 110 may determine the third number of NACKs and DTXs from the second terminal device 120-1 as the third number of failed packets or failed transport blocks. good.

Alternatively, in embodiments in which first terminal 110 communicates with terminal 120-1 in a unicast manner, first terminal 110 may unicast first terminal 110 for a single HARQ process ID within the second time window. may determine the fifth number of NACKs received by . If a second ratio of the fifth number to the sum of NACKs and acknowledgments (ACKs) received by the first terminal device 110 for a single HARQ process ID exceeds a fourth set threshold, the first terminal device 110: It may be determined that a predefined condition is met.

In some embodiments, the first terminal 110 may determine the third number of NACKs and DTXs from the second terminal 120 as the third number of failed packets or failed transport blocks.

As mentioned above, in some embodiments, the first terminal device 110 may communicate with a group of terminals in a groupcast manner. A group of terminals may include terminal 120-1 and terminal 120-2, as well as other devices not shown in FIG. In other words, the first terminal 110 may send at least one packet to a group of terminals. In such embodiments, first terminal 110 may detect the power of the sixth number of NACKs for at least one packet sent to the group from the associated PSFCH resource. If the detected power exceeds a fourth set threshold, the first terminal device 110 may determine that the predefined condition is met. In some embodiments, the detected power is normalized to the group size. Group size herein may hereinafter refer to the number of member UEs or receivers in the group, or the group size from higher layers.

Alternatively, in embodiments where the first terminal 110 communicates with a group of terminals in a groupcast manner, the first terminal 110 may determine a third ratio of the sixth number of NACKs to the size of the group. . If the third ratio exceeds a fifth set threshold, the first terminal device 110 may determine that the predefined condition is met.

In some embodiments, if the priority in the sidelink control information (SCI) for a packet or signal transmitted by the first terminal device exceeds a sixth set threshold, the first terminal device 110 responds to a predefined condition may be determined to be satisfied.

Alternatively, for a packet or signal transmitted by the first terminal device, if the QoS (Quality of Service) parameter from the upper layer or in the SCI exceeds a sixth setting threshold, the first terminal device 110 is set to a predefined condition may be determined to be satisfied.

Alternatively, for packets or signals transmitted by the first terminal device, if the 5G quality indication (5QI: 5G Quality Indication) from the upper layer exceeds a sixth set threshold, the first terminal device 110 determines that a predefined condition is may be determined to be satisfied.

In some embodiments, the first terminal device 110 may measure the sidelink channel busy ratio (SL CBR) or the sidelink channel occupancy ratio (SL CR). If the measured SL CBR or SL CR exceeds a set threshold, the first terminal device 110 may determine that the predefined condition is met.

In some embodiments, when the first terminal 110 receives the first request from the second terminal 120, the first terminal 110 may decide to obtain information about resource candidates. The first request indicates that the second terminal device 120 will send information to the first terminal device 110 .

In some embodiments, the first terminal 110 may receive the first request from the second terminal 120 via radio resource control signaling. Alternatively, the first terminal device 110 may receive the first request via sidelink control information. Alternatively, first terminal 110 may receive the first request via a physical sidelink feedback channel (PSFCH) between first terminal 110 and second terminal 120 .

In some embodiments, when first terminal 110 receives signaling from a network device indicating that second terminal 120 is to send information to first terminal 110, first terminal 110 sends the information may decide to obtain

In some embodiments, the first terminal device 110 may receive such signaling from network devices via radio resource control signaling. Alternatively, the first terminal device 110 may receive such signaling from the network device via downlink control information.

With continued reference to FIG. 2, the first terminal device 110 receives information from the second terminal device 120 (220) if it is determined to obtain information about resource candidates.

In some embodiments, first terminal 110 may receive information via one of a physical sidelink control channel (PSCCH), PSFCH, or RRC signaling.

In some embodiments, optionally, the first terminal 110 may send a second request for resource allocation to the second terminal 120 if it is decided to obtain information about resource candidates. Good (230).

In some embodiments, first terminal device 110 may send the second request via SCI. For example, the first terminal device 110 may send the second request via first stage SCI carried on the PSCCH. Thus, one or more terminals may receive the second request. For example, both terminal device 120-1 and terminal device 120-2 may receive the second request.

Alternatively, the first terminal device 110 may send the second request via a second stage SCI carried on the PSSCH. In this way, only the intended recipient may receive the second request. For example, if the first terminal device 110 has established a sidelink with the terminal device 120-1, only the terminal device 120-1 may receive the second request.

In some embodiments, the first terminal device 110 may send the second request via a medium access control control element (MAC CE) or RRC signaling. In this way, only the intended recipient may receive the second request.

In some embodiments, second terminal 120 may optionally send 240 a first response to the second request for resource allocation to first terminal 110 . The first response indicates that the second terminal device 120 accepts the second request. In such embodiments, the second terminal device 120 may send an indication to the first terminal device 110 indicating the location of the information rather than the information itself. The indication may indicate the location of information in MAC CE on PSSCH.

In some embodiments, the second terminal device 120 may send resource candidate information without responding to the second request. For example, the second terminal device 120 may transmit resource candidate information via the PSFCH between the second terminal device 120 and the first terminal device 110 . In this case, the first terminal 110 will always attempt to decode information about resource candidates from the associated PSFCH.

In some embodiments, second terminal device 120 may send the first response and the indication in parallel. For example, second terminal device 120 may transmit the first response along with the instruction over the PSFCH between second terminal device 120 and first terminal device 110 . Alternatively, the second terminal device 120 may send the first response and the instruction consecutively.

Transmitting the first response and the indication may reduce overhead on the PSFCH compared to transmitting both the first response and the information itself over the PSFCH.

In another embodiment, optionally, the second terminal device 120 may send a second response to the second request for resource allocation to the first terminal device 110 . The second response indicates that the second terminal device 120 refuses the second request. Upon receiving the second response, the first terminal device does not attempt to decode information on resource candidates.

In some embodiments, second terminal 120 may transmit the second response over the PSFCH between second terminal 120 and first terminal 110 .

With continued reference to FIG. 2, the first terminal 110 determines 250 target resources for performing sidelink transmissions based on information about the resource candidates.

In some embodiments, the information about resource candidates includes information about the first slot set not used by second terminal 120 . For example, the resources include a first set of slots not used for transmission by terminal 120-1 during the session. In such an embodiment, to support avoidance of half-duplex at terminal 120-1 during a session, first terminal 110 uses a first At least a portion of the slot set may be selected.

In some other embodiments, the information about resource candidates includes information about the second slot set used by second terminal 120 . For example, the resources include a second set of slots used for transmission by terminal 120-1 in session. In such an embodiment, to support avoidance of half-duplex at terminal 120-1 during a session, first terminal 110 reduces the resource pool by excluding the second slot set from the resource pool. The target resource may be determined from

In yet another embodiment, the resource candidates include one or more resource sets that are the result of sensing on sidelink channels by one or more second terminals 120 . For example, resource candidates include one or more resource sets that are the result of sensing on the sidelink channel by at least out-of-session terminal 120-2 and other devices not shown in FIG. Upon receiving the information about the sensing result, the first terminal device 110 may determine the target resource. For example, the target resource is determined to be at least one of the result of sensing or the result of a combination. In this way, the first terminal device 110 does not need to sense sidelink channels for resource selection.

In yet another embodiment, the resource candidates include resource sets configured by network devices.

FIG. 3 depicts an exemplary signaling chart illustrating an exemplary process 300 of resource allocation according to some embodiments of the present disclosure. As shown in FIG. 3, process 300 may involve first terminal 110 and second terminal 120 shown in FIG. It is to be understood that process 300 may include additional acts not shown and/or may omit some acts shown, and the scope of the disclosure is not limited in this respect. Further, although presented herein primarily as being performed sequentially, at least some of the operations of process 300 may be performed concurrently or in a different order than shown in FIG. It should be understood that the

As shown in FIG. 3, second terminal 120 determines 310 resource candidates for first terminal 110 to perform sidelink transmissions.

In some embodiments, resource candidates include a first set of slots not used by second terminal 120 . For example, resource candidates include a first set of slots not used by terminal 120-1 in session. In such an embodiment, to support avoidance of half-duplex at terminal 120-1 during a session, first terminal 110 uses a first At least a portion of the slot set may be selected.

In some other embodiments, the resource candidates include the second set of slots used by second terminal 120 . For example, the resource candidates include the second set of slots used by terminal 120-1 in session. In such an embodiment, to support avoidance of half-duplex at terminal 120-1 during a session, first terminal 110 reduces the resource pool by excluding the second slot set from the resource pool. The target resource may be determined from

In yet another embodiment, the resource candidates include one or more resource sets that are the result of sensing by at least the second terminal device 120 on the sidelink channel.

Upon determining resource candidates for sidelink transmission performance by first terminal 110, second terminal 120 determines whether to provide information regarding resource candidates (320).

In some embodiments, when the second terminal 120 receives the second request from the first terminal 120, the second terminal 120 may decide to provide the information. The second request indicates that the first terminal device 110 receives information from the second terminal device 120 .

In some embodiments, upon receiving the second request, the second terminal 120 may further determine whether the second terminal 120 is capable of providing the information. good. If the second terminal device 120 is capable of providing the information, the second terminal device 120 may decide to provide the information.

In another embodiment, upon receiving the second request, the second terminal device 120 may further determine the distance between the second terminal device 120 and the first terminal device 110 . If the distance is below a set threshold, the second terminal device 120 may decide to provide the information. In some embodiments, the distance may include one of physical distance and wireless distance.

As described with reference to FIG. 2, first terminal device 110 may send the second request via SCI, MAC CE, or RRC signaling. Accordingly, second terminal device 120 may receive the second request via SCI, MAC CE, or RRC signaling.

As described with reference to FIG. 2, the first terminal 110 may send the second request via a first stage SCI carried on the PSCCH or a second stage SCI carried on the PSSCH. . Accordingly, second terminal 120 may receive the second request via the first stage SCI carried on the PSCCH or the second stage SCI carried on the PSSCH.

In some embodiments, upon receiving the second request, second terminal device 120 may send a first response to the second request to first terminal device 110 . The first response indicates that the second terminal device 120 accepts the second request. In some embodiments, second terminal 120 may transmit the first response over the PSFCH between second terminal 120 and first terminal 110 .

In some embodiments, the second terminal 120 may send an indication to the first terminal 110 indicating the location of the information. In some embodiments, the indication indicates the location of information in MAC CE on PSSCH.

In some embodiments, the second terminal device 120 may send information directly to the first terminal device 110 . In some embodiments, second terminal 120 may transmit the first response over the PSFCH between second terminal 120 and first terminal 110 .

In another embodiment, upon receiving the second request, the second terminal device 120 may send a second response to the second request to the first terminal device 110 . The second response indicates that the second terminal device 120 refuses the second request. In some embodiments, second terminal 120 may transmit the second response over the PSFCH between second terminal 120 and first terminal 110 .

In some embodiments, the second terminal 120 receives information from the first terminal 110 for a single application to determine whether to provide information about resource candidates. The time elapsed between successive successful receptions of two different packets sent to device 120 may be detected. If the time exceeds a set threshold, the second terminal device 120 may decide to provide the information.

In another embodiment, when the second terminal device 120 receives signaling from the network device indicating that the first terminal device 110 receives information from the second terminal device 120, the second terminal device 120 receives the information. You may decide to provide

With continued reference to FIG. 3, the second terminal device 120 transmits information to the first terminal device 110 (330).

In some embodiments, second terminal device 120 may transmit information via the PSFCH between second terminal device 120 and first terminal device 110 .

In some other embodiments, second terminal 120 may transmit information via PSSCH.

In yet another embodiment, second terminal device 120 may transmit information via RRC signaling.

In some embodiments, optionally, prior to sending information to the first terminal 110, the second terminal 120 may send a first request to the first terminal 110 (340). The first request indicates that the second terminal device 120 will send information to the first terminal device 110 .

In some embodiments, upon receiving the first request, first terminal device 110 may send 350 a response to the first request. The response indicates that the first terminal device 110 accepts the first request.

FIG. 4 shows a flowchart of an exemplary method 400 according to some embodiments of the present disclosure. The method 400 may be performed at the first terminal device 110, as shown in FIGS. 1-2. It is to be understood that the method 400 may include additional blocks not shown and/or omit some blocks shown, and the scope of the disclosure is not limited in this respect.

At block 410, the first terminal device 110 determines whether to obtain information regarding resource candidates for sidelink transmission.

At block 420 , the first terminal device 110 receives information from the second terminal device 120 in response to determining to obtain information.

At block 430, the first terminal device 110 makes an informed determination of target resources for performing sidelink transmissions.

In some embodiments, determining to obtain information about the candidate resource includes determining to obtain the information in response to determining that a predefined condition is met.

In some embodiments, the method 400 further comprises, for at least one packet transmitted from the first terminal device to the second terminal device, the first number of consecutive failed packets or transport blocks equal to determining that a predefined condition is satisfied according to determining that the is exceeded.

In some embodiments, the first number of consecutive failed packets or transport blocks is determined based on the first number of negative acknowledgments and intermittent transmissions from the second terminal.

In some embodiments, the method 400 further determines that a second number of consecutive negative acknowledgments received by the first terminal exceeds a second set threshold for the single hybrid automatic repeat request process identifier. Determining that a predefined condition has been met according to the determination.

In some embodiments, the method 400 further includes detecting failed packets or failed transport blocks for a fourth number of packets or transport blocks transmitted from the first terminal to the second terminal within the first time window. determining that a predefined condition is met according to determining that a first proportion of a third number of port blocks exceeds a third set threshold; or within a second time window, a first according to determining that a second ratio of a fifth number of negative acknowledgments received by the first terminal device to a sum of negative acknowledgments and positive acknowledgments received by the terminal device exceeds a fourth set threshold; Involves determining that a defined condition has been met.

In some embodiments, the third number of failed packets or failed transport blocks is determined based on the third number of negative acknowledgments and intermittent transmissions from the second terminal device.

In some embodiments, the method 400 further comprises detecting that the detected power of the sixth number of negative acknowledgments exceeds a fourth set threshold for at least one packet transmitted from the first terminal 110 to the group of terminals. or determining that a third ratio of the sixth number of negative responses to the size of the group exceeds a fifth set threshold. Determining that a predefined condition has been met according to the determination.

In some embodiments, the detected power is normalized to the group size.

In some embodiments, the method 400 further determines that one of a priority in SCI, a QoS parameter, or 5QI exceeds a sixth set threshold for packets or signals transmitted by the first terminal device 110. determining that a predefined condition is satisfied according to what has been done.

In some embodiments, determining whether to obtain information about the resource candidates includes determining to obtain the information in response to receiving the first request from the second terminal device 120 . The first request indicates that the second terminal device 120 will send information to the first terminal device 110 .

In some embodiments, determining whether to obtain information about resource candidates includes receiving signaling from a network device indicating that second terminal 120 is to send information to first terminal 110 . depending on the situation, and determining to obtain the information.

In some embodiments, the method 400 further includes transmitting a second request for resource allocation to the second terminal device 120 in response to determining to obtain the information.

In some embodiments, sending the second request includes sending the second request via one of SCI, MAC CE or RRC signaling.

In some embodiments, sending the second request via SCI is via one of a first stage SCI carried on the PSCCH or a second stage SCI carried on the PSSCH. 2 sending a request.

In some embodiments, method 400 further includes receiving from second terminal 120 a first response to the second request. The first response indicates that the second terminal device 120 accepts the second request.

In some embodiments, receiving the first response includes receiving the first response over the PSFCH.

In some embodiments, method 400 further includes receiving from second terminal 120 a second response to the second request. The second response indicates that the second terminal device 120 refuses the second request.

In some embodiments, receiving the second response includes receiving the second response over the PSFCH.

In some embodiments, receiving the information includes receiving an indication from the second terminal device 120 indicating the location of the information.

In some embodiments, the indication indicates the location of information in MAC CE on PSSCH.

In some embodiments, the information about resource candidates includes information about the first slot set not used by second terminal 120 . Also, determining target resources based on the information includes selecting at least a portion of the first set of slots.

In some embodiments, the information about resource candidates includes information about the second slot set used by second terminal 120 . Also, determining the target resource based on the information includes determining the target resource from the resource pool by excluding the second set of slots from the resource pool.

In some embodiments, resource candidates include one or more resource sets that are the result of sensing on the sidelink channel by at least second terminal device 120 .

In some embodiments, receiving the information includes receiving the information via one of PSFCH, PSSCH or RRC signaling.

In some embodiments, the method 400 further determined that the measured sidelink channel congestion ratio (SL CBR) or the measured sidelink channel occupancy (SL CR) exceeds a set threshold. determining that a predefined condition has been met according to.

In some embodiments, resource candidates include resource sets configured by network devices.

FIG. 5 shows a flowchart of an exemplary method 500 according to some embodiments of the present disclosure. The method 500 can be performed at the second terminal device 120, as shown in FIGS. It is to be understood that the method 500 may include additional blocks not shown and/or omit some blocks shown, and the scope of the disclosure is not limited in this respect.

At block 510, the second terminal 120 determines resource candidates for the first terminal 110 to perform sidelink transmissions.

At block 520, the second terminal 120 determines whether to provide information regarding resource candidates.

At block 530 , the second terminal 120 transmits the information to the first terminal 110 in response to determining to provide the information.

In some embodiments, determining whether to provide information regarding resource candidates includes determining to provide the information in response to receiving the second request from the first terminal device 110 . The second request indicates that the first terminal device 110 receives information from the second terminal device 120 .

In some embodiments, determining whether to provide information about resource candidates further includes determining whether to provide information based on capabilities of second terminal device 120 .

In some embodiments, determining whether to provide information about resource candidates is based on the distance between the second terminal device 120 and the first terminal device 110. further comprising determining

In some embodiments, the distance includes one of physical distance and wireless distance.

In some embodiments, receiving the second request includes receiving the second request via one of SCI, MAC CE or RRC signaling.

In some embodiments, receiving the second request via SCI is via one of a first stage SCI carried on the PSCCH or a second stage SCI carried on the PSSCH. 2 receiving a request.

In some embodiments, method 500 further includes sending to first terminal device 110 a first response to the second request. The first response indicates that the second terminal device 120 accepts the second request.

In some embodiments, transmitting the first response includes transmitting the first response over the PSFCH.

In some embodiments, transmitting the information includes transmitting an indication to the first terminal device 110 indicating the location of the information.

In some embodiments, the indication indicates the location of information in MAC CE on PSSCH.

In some embodiments, method 500 further includes sending a second response to the second request to first terminal device 110 . The second response indicates that the second terminal device 120 refuses the second request.

In some embodiments, sending the second response includes sending the second response over the PSFCH.

In some embodiments, determining whether or not to provide information about resource candidates may be performed in two consecutive packets sent from first terminal 110 to second terminal 120 for a single application. and determining to provide the information in response to the time elapsed between successful receptions of the message exceeding a set threshold.

In some embodiments, determining whether to provide information about the resource candidate includes receiving signaling from the network device indicating that the first terminal 110 receives information from the second terminal 120 . including deciding to provide information on a case-by-case basis.

In some embodiments, method 500 further includes sending the first request to first terminal device 110 . The first request indicates that the second terminal device 120 will send information to the first terminal device 110 .

In some embodiments, resource candidates include a first set of slots not used by second terminal 120 .

In some embodiments, the resource candidates include the second set of slots used by second terminal 120 .

In some embodiments, resource candidates include one or more resource sets that are the result of sensing on the sidelink channel by at least second terminal device 120 .

In some embodiments, transmitting the information includes transmitting the information via one of PSFCH, PSSCH or RRC signaling.

FIG. 6 is a schematic block diagram of an apparatus 600 suitable for implementing embodiments of the present disclosure. Device 600 can be considered to be a further exemplary implementation of terminal device 110 or 120 shown in FIG. Thus, device 600 may be implemented in terminal device 110 or 120, or at least as part thereof.

As shown, the apparatus 600 is coupled to a processor 610, a memory 620 coupled to the processor 610, a suitable transmitter (TX) and receiver (RX) 640 coupled to the processor 610, and a TX/RX 640. communication interface. Memory 610 stores at least part of program 630 . TX/RX 640 is for two-way communication. TX/RX 640 has at least one antenna to facilitate communication, although in practice the access nodes described herein may have multiple antennas. A communication interface is any interface necessary to communicate with other network elements, such as an X2 interface for bi-directional communication between eNBs, a Mobility Management Entity (MME)/serving gateway (S-GW) and an eNB. , the Un interface for communication between an eNB and a relay node (RN), or the Uu interface for communication between an eNB and a terminal device.

The program 630 is considered to include program instructions, which, when executed by the associated processor 610, implements an apparatus according to embodiments of the present disclosure, as discussed herein with reference to FIGS. 1-6. 600 to operate. Embodiments herein may be implemented by computer software executable by processor 610 of device 600, hardware, or a combination of software and hardware. Processor 610 may be configured to implement various embodiments of the present disclosure. Also, the combination of processor 610 and memory 620 may constitute processing means 650 suitable for implementing embodiments of the present disclosure.

Memory 620 may be of any type suitable for the local technology network and may be of any suitable data storage technology (e.g., computer-readable non-transitory storage media, semiconductor-based storage, magnetic storage, and systems, optical storage devices and systems, fixed memory and removable memory, etc.). Although only one memory 620 is shown in device 600, multiple physically distinct memory modules may be installed in device 600. FIG. Processor 610 may be of any type suitable for the local technology network, such as general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs), and processors based on multi-core processor configurations; It may include one or more, but is not limited to these. Apparatus 600 may have multiple processors, eg, application-specific integrated circuit chips that are temporally slaved to a clock that is synchronized with a master processor.

In general, each embodiment of the present disclosure may be implemented by hardware or dedicated circuitry, software, logic, or any combination thereof. Some aspects may be implemented by hardware, while other aspects may be implemented by firmware or software, which may be executed by a controller, microprocessor or other computing device. While aspects of the embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or represented by some other pictorial representation, it is to be understood that the blocks, devices, and , systems, techniques or methods may be implemented by, for example, but not limited to, hardware, software, firmware, dedicated circuitry or logic, general purpose hardware or controllers or other computing devices, or combinations thereof. .

The present disclosure further provides at least one computer program product tangibly stored on a computer-readable, non-transitory storage medium. The computer program product comprises computer-executable instructions, such as instructions contained in program modules. The instructions are executed in a device on the target real or virtual processor to perform, for example, the processes or methods described above with reference to FIGS. 4-5. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, etc. that perform particular tasks or implement particular abstract data types. In each embodiment, the functionality of the program modules may be combined or split between program modules as desired. Machine-readable instructions for program modules may be executed on local or distributed devices. In a distributed device, program modules may be located in both local and remote readable media.

Program code for executing the methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer or other programmable data processing apparatus and, when the program code is executed by the processor or controller, may be represented by flowcharts and/or block diagrams. The specified function/operation is performed. Whether the program code runs entirely on the machine, partially on the machine, as a separate software package, or partially on the machine and partially on a remote machine. , or may all run on a remote machine or server.

The program code described above may be embodied on a machine-readable medium, which includes programs used by or in conjunction with an instruction execution system, device or apparatus. or any tangible medium for storage. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, any electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Even more specific examples of machine-readable storage media include one or more wires, portable computer diskettes, hard disks, random access memory (RAM), read-only memory (ROM), erasable and writable read-only memory. Memory (EPROM or flash memory), fiber optics, portable compact disc read only memory (CD-ROM), optical storage, magnetic storage, or any suitable combination of the foregoing may be included.

It should be noted that although the operations have been described in a particular order, it should be understood that such operations may be performed in the specific order shown, or may be performed in sequence, or all of the operations shown may be performed to achieve the desired result. should not be understood to require the implementation of Multitasking and parallel processing can be advantageous in some situations. Similarly, although the above discussion contains some specific implementation details, these should not be construed as limitations on the scope of the disclosure, but as descriptions of features that may be identified in particular embodiments. It should be. Certain features that are described in the context of individual embodiments can also be implemented in combination in a given embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.

While the disclosure has been described in language specific to structural features and/or methodological acts, it is understood that the disclosure, as defined by the appended claims, is not necessarily limited to the specific features or acts described above. It should be. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

Claims (51)

Determining whether to acquire information about resource candidates for sidelink transmission in the first terminal device;
receiving the information from a second terminal device in response to determining to obtain the information;
determining a target resource for performing the sidelink transmission based on the information;
methods for communication, including Determining whether to obtain the information about the resource candidate includes:
determining to obtain the information in response to determining that a predefined condition is met;
The method of claim 1. According to determining that, for at least one packet transmitted from the first terminal device to the second terminal device, a first number of consecutive failed packets or transport blocks exceeds a first set threshold; further comprising determining that the predefined condition is met;
3. The method of claim 2. the first number of consecutive failed packets or transport blocks is determined based on the first number of negative acknowledgments and intermittent transmissions from the second terminal device;
4. The method of claim 3. According to determining that a second number of negative acknowledgments consecutively received by the first terminal exceeds a second set threshold for a single hybrid automatic repeat request process identifier, the predefined condition is further comprising determining that the
3. The method of claim 2. A first ratio of a third number of failed packets or transport blocks to a fourth number of packets or transport blocks transmitted from the first terminal to the second terminal within a first time window. is above a third set threshold, determining that the predefined condition is satisfied; or
The fifth negative acknowledgment received by said first terminal to the sum of negative acknowledgments and positive acknowledgments received by said first terminal for a single hybrid automatic repeat request process identifier within a second time window. determining that the predefined condition is met according to determining that a second proportion of numbers exceeds a fourth set threshold;
further comprising
3. The method of claim 2. the third number of failed packets or failed transport blocks is determined based on the third number of negative acknowledgments and intermittent transmissions from the second terminal device;
7. The method of claim 6. For at least one packet sent from the first terminal to a group of terminals,
determining that the predefined condition is met according to determining that the detected power of a sixth number of negative acknowledgments exceeds a fourth set threshold; or
determining that the predefined condition is met according to determining that a third ratio of the sixth number of negative responses to the size of the group exceeds a fifth set threshold;
further comprising
3. The method of claim 2. the detected power is normalized to the size of the group;
9. The method of claim 8. For packets or signals transmitted by the first terminal device,
priority in sidelink control information,
determining that the predefined condition is met according to determining that one of a quality of service parameter or a 5G quality indication exceeds a sixth set threshold;
3. The method of claim 2. determining that the predefined condition is met according to determining that the measured sidelink channel congestion ratio or the measured sidelink channel occupancy exceeds a set threshold;
3. The method of claim 2. Determining whether to obtain the information about the resource candidates includes:
determining to obtain the information in response to receiving a first request from the second terminal device;
the first request indicates that the second terminal device transmits the information to the first terminal device;
The method of claim 1. Determining whether to obtain the information about the resource candidate includes:
determining to obtain the information in response to receiving signaling from a network device indicating that the second terminal device will transmit the information to the first terminal device;
The method of claim 1. Further comprising transmitting a second request for resource allocation to the second terminal device in response to determining to obtain the information.
The method of claim 1. Sending the second request includes:
sidelink control information,
control elements for media access control, or radio resource control signaling,
sending the second request via one of
15. The method of claim 14. Sending the second request via the sidelink control information includes:
first stage sidelink control information carried on a physical sidelink control channel, or second stage sidelink control information carried on a physical sidelink shared channel,
sending the second request via one of
16. The method of claim 15. further comprising receiving a first response to the second request from the second terminal, the first response indicating that the second terminal accepts the second request;
15. The method of claim 14. Receiving the first response includes:
receiving the first response over a physical sidelink feedback channel;
18. The method of claim 17. further comprising receiving a second response to the second request from the second terminal, the second response indicating that the second terminal rejects the second request;
15. The method of claim 14. Receiving the second response
receiving the second response over a physical sidelink feedback channel;
20. The method of claim 19. Receiving the information includes:
receiving an indication from the second terminal device indicating the location of the information;
18. The method of claim 17. said indication indicates said location of said information in a control element of media access control on a physical sidelink shared channel;
22. The method of claim 21. the information about the resource candidate includes information about a first slot set not used by the second terminal device;
Determining the target resource based on the information includes:
selecting at least a portion of the first set of slots;
The method of claim 1. The information about the resource candidate includes information about a second slot set used by the second terminal device,
Determining the target resource based on the information includes:
determining the target resource from the resource pool by excluding the second set of slots from the resource pool;
The method of claim 1. The resource candidate includes at least one or more resource sets that are results of sensing for sidelink channels by the second terminal device,
The method of claim 1. the resource candidates include a resource set configured by a network device;
The method of claim 1. Receiving the information includes:
physical sidelink feedback channel,
physical sidelink shared channel, or radio resource control signaling,
receiving said information via one of
The method of claim 1. Determining, in the second terminal device, resource candidates for the first terminal device to perform sidelink transmission;
determining whether to provide information about the resource candidate;
transmitting the information to the first terminal device in response to determining to provide the information;
including,
way for communication. Determining whether to provide the information about the resource candidates includes:
determining to provide the information in response to receiving a second request from the first terminal;
the second request indicates that the first terminal receives the information from the second terminal;
29. The method of claim 28. Determining whether to provide the information about the resource candidates includes:
Further comprising determining whether to provide the information based on the capabilities of the second terminal device;
30. The method of claim 29. Determining whether to provide the information about the resource candidates includes:
Further comprising determining whether to provide the information based on the distance between the second terminal device and the first terminal device;
30. The method of claim 29. the distance comprises one of physical distance and wireless distance;
32. The method of claim 31. Receiving the second request includes:
sidelink control information,
control elements for media access control, or radio resource control signaling,
receiving the second request via one of
30. The method of claim 29. Receiving the second request via the sidelink control information,
first stage sidelink control information carried on a physical sidelink control channel, or second stage sidelink control information carried on a physical sidelink shared channel,
receiving the second request via one of
30. The method of claim 29. further comprising transmitting a first response to the second request to the first terminal device;
the first response indicates that the second terminal accepts the second request;
30. The method of claim 29. Sending the first response includes:
transmitting the first response over a physical sidelink feedback channel;
36. The method of claim 35. Sending the information includes:
transmitting an indication to the first terminal device indicating the location of the information;
36. The method of claim 35. said indication indicates said location of said information in a control element of media access control on a physical sidelink shared channel;
38. The method of claim 37. further comprising transmitting a second response to the second request to the first terminal device;
the second response indicates that the second terminal device rejects the second request;
30. The method of claim 29. Sending the second response includes:
transmitting the second response over a physical sidelink feedback channel;
40. The method of claim 39. Determining whether to provide the information about the resource candidates includes:
in response to the time elapsed between two consecutive successful receptions of two different packets transmitted from said first terminal device to said second terminal device for a single application exceeding a set threshold. , deciding to provide said information;
29. The method of claim 28. Determining whether to provide the information about the resource candidates includes:
determining to provide the information in response to receiving signaling from a network device indicating that the first terminal receives the information from the second terminal;
29. The method of claim 28. further comprising sending a first request to the first terminal device;
the first request indicates that the second terminal device transmits the information to the first terminal device;
43. A method according to claim 41 or 42. The resource candidates include a first slot set that is not used by the second terminal device,
29. The method of claim 28. The resource candidate includes a second slot set used by the second terminal device,
29. The method of claim 28. The resource candidate includes at least one or more resource sets that are results of sensing for sidelink channels by the second terminal device,
29. The method of claim 28. Sending the information includes:
physical sidelink feedback channel,
physical sidelink shared channel, or radio resource control signaling,
transmitting said information via one of
29. The method of claim 28. a processor;
a memory coupled to the processor and in which instructions are stored;
with
performing the method of any one of claims 1 to 27 when said instructions are executed by said processor;
first terminal device; a processor;
a memory coupled to the processor and in which instructions are stored;
with
performing the method of any one of claims 28 to 47 when said instructions are executed by said processor;
Second terminal device. A computer-readable medium having instructions stored thereon,
The instructions, when executed on at least one processor of a device, cause the device to perform the method of any one of claims 1 to 27,
computer readable medium. A computer-readable medium having instructions stored thereon,
The instructions, when executed on at least one processor of a device, cause the device to perform the method of any one of claims 28-47,
computer readable medium.

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